add composer.json for simplfy grabbing bibtexbrowser with composer

composer.json

@@ -0,0 +1,16 @@
+{
+    "name": "monperrus/bibtexbrowser",
+    "description": "bibtexbrowser is a PHP script that creates publication lists from Bibtex files. bibtexbrowser is stable, mature and easy to install.",
+    "homepage": "http://www.monperrus.net/martin/bibtexbrowser/",
+    "license": "GPL-2.0+",
+    "authors": [
+	{
+	    "name": "Martin Monperrus",
+	    "homepage": "http://www.monperrus.net",
+	    "role": "Original Developer"
+	}
+    ],
+    "require": {
+	"php": "4 - 5"
+    }
+}